The mods typically frown on such solicitation on the board.
Yes, the TrekBBS Frequently Asked Questions and Forum Rules has an admonition:
"Soliciting: Do not attempt to solicit other BBS members; posting to sell or endorse a product or web site will not be permitted."
Admittedly, it can be a fine line between "Hey, this is cool. I hope they make more!" and "Hey, this is cool so send them some money so they can make more!"
Try to talk interestingly and respectfully on the forum and try to refrain from becoming a commercial.
Forum Rules are here: